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Library of Congress Subject Areas (15545)
- A General Works (57)
  - AC Collections. Series. Collected works (16)
  - AI Indexes (General) (19)
  - AM Museums (General). Collectors and collecting (General) (4)
  - AS Academies and learned societies (General) (19)
  - AZ History of Scholarship The Humanities (3)
- B Philosophy. Psychology. Religion (25)
  - B Philosophy (General) (2)
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- C Auxiliary Sciences of History (4)
  - C Auxiliary sciences of history (General) (1)
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- D History General and Old World (5)
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    - D051 Ancient History (2)
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- E History America (1)
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- G Geography. Anthropology. Recreation (37)
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- H Social Sciences (5352)
  - H Social Sciences (General) (1130)
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  - HB Economic Theory (370)
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  - HD Industries. Land use. Labor (703)
    - HD1401 Agriculture-Economic aspects (98)
    - HD28 Management. Industrial Management (251)
    - HD30.213 Decision Support Systems (14)
    - HD30.27 Business Forecasting (18)
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    - HD30.3 Communication in Organizations (30)
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    - HD9000 Agricultural Industries (101)
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  - HE Transportation and Communications (52)
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- L Education (783)
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- M Music and Books on Music (10)
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- N Fine Arts (797)
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    - N400-3990 Art museums, galleries, etc. (13)
    - N61-72 Theory. Philosophy. Aesthetics of the visual arts (31)
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  - NX Arts in general (104)
- P Language and Literature (424)
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    - P302-302.87 Discourse analysis (5)
    - P87 Communication. Mass Media (328)
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- Q Science (1205)
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    - QA76.87 Neural computers (19)
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  - QC Physics (28)
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- R Medicine (19)
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  - RS Pharmacy and materia medica (2)
  - RZ Other systems of medicine (1)
- S Agriculture (1290)
  - S Agriculture (General) (1111)
    - S590-599.9 Soils. Soil science (146)
    - S631-667 Fertilizers and Improvement of the soil (126)
  - SB Plant culture (216)
    - SB599-990.5 Pests and Diseases (50)
    - SB950-989 Pest Control and Treatment of Diseases, Plant Protection (108)
  - SD Forestry (23)
  - SF Animal culture (19)
  - SH Aquaculture. Fisheries. Angling (22)
  - SK Hunting sports (1)
- T Technology (4817)
  - T Technology (General) (1521)
    - T55.4-60.8 Industrial engineering. Management engineering (366)
    - T201 Patents. Trademarks (6)
    - T385 Computer Graphics (79)
    - T58.6-58.62 Management Information Systems (450)
  - TA Engineering (General). Civil engineering (General) (524)
  - TC Hydraulic engineering. Ocean engineering (9)
  - TD Environmental technology. Sanitary engineering (848)
  - TE Highway engineering. Roads and pavements (34)
  - TF Railroad engineering and operation (6)
  - TG Bridge engineering (2)
  - TH Building construction (65)
  - TJ Mechanical engineering and machinery (43)
  - TK Electrical engineering. Electronics Nuclear engineering (95)
    - TK5105 Computer Network (40)
    - TK5105.882 Internet (35)
    - TK5105.888 World Wild Web (39)
  - TL Motor vehicles. Aeronautics. Astronautics (2)
  - TN Mining engineering. Metallurgy (7)
  - TP Chemical technology (1724)
    - TP155 Chemical engineering (1293)
    - TP368 Food processing and manufacture (299)
    - TP500 Fermentation industries. Beverages. Alcohol (15)
  - TR Photography (8)
  - TS Manufactures (226)
    - TS 155-194 Production Management, Operations Management (161)
    - TS 180-TS180.8 Material Handling (9)
  - TT Handicrafts Arts and crafts (9)
  - TX Home economics (15)
- U Military Science (8)
  - U Military Science (General) (8)
- V Naval Science (7)
  - V Naval Science (General) (2)
  - VM Naval architecture. Shipbuilding. Marine engineering (5)
- Z Bibliography. Library Science. Information Resources (44)
  - Z004 Books. Writing. Paleography (2)
  - Z665 Library Science. Information Science (26)
  - Z719 Libraries (General) (7)
  - ZA Information resources (13)
    - ZA4050 Electronic information resources (3)
    - ZA4450 Databases (6)